<div class="layui-side layui-bg-black">
    <div class="layui-side-scroll">
      <ul class="layui-nav layui-nav-tree" lay-filter="test">
        <li class="layui-nav-item"><a href="/">首页</a></li>
        <li class="layui-nav-item layui-nav-itemed">
          <a class="" href="javascript:;">分类管理</a>
          <dl class="layui-nav-child">
            <dd><a href="/category">分类列表</a></dd>
            <dd><a href="/article">文章列表</a></dd>
          </dl>
        </li>
        <li class="layui-nav-item">
          <a href="javascript:;">系统设置</a>
          <dl class="layui-nav-child">
              <dd><a href="/system">设置系统</a></dd>
          </dl>
        </li>
        
        
        <li class="layui-nav-item"><a href="">the links</a></li>
      </ul>
    </div>
  </div>